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SOH CAH TOA - trigonometry

A way to remember the definitions of the three most common trigonometry functions: sin, cos and tan.

Used as a memory aid for the definitions of the three common trigonometry functions sine, cosine and tangent. When spoken it is usually pronounced a bit like "soaka towa".

SOH Sine = Opposite over Hypotenuse.
CAH Cosine = Adjacent over Hypotenuse.
TOA Tangent = Opposite over Adjacent.

Other trigonometry topics

Angles

Trigonometric functions

Solving trigonometry problems

Calculus